F and G are not 0.
F and G are parallel
Proof that F X G is=0
Attempt for a sol:
But then I don´t know how to show that they are parallel.
Find some numbers for F and G that I know that makes them parallel and show that FXG
But I think I´m not supposed to use numbers, but a,b,c...
Would you use either one of theses attempts or not?